<template>
    <div :id="id" :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from "echarts";
import resize from "./mixins/resize";

export default {
    mixins: [resize],
    props: {
        className: {
            type: String,
            default: "chart"
        },
        id: {
            type: String,
            default: "chart"
        },
        width: {
            type: String,
            default: "200px"
        },
        height: {
            type: String,
            default: "200px"
        }
    },
    data() {
        return {
            chart: null
        };
    },
    mounted() {
        this.initChart();
    },
    beforeDestroy() {
        if (!this.chart) {
            return;
        }
        this.chart.dispose();
        this.chart = null;
    },
    methods: {
        initChart() {
            this.chart = echarts.init(document.getElementById(this.id));

            const xAxisData = [];
            const data = [];
            const data2 = [];
            for (let i = 0; i < 50; i++) {
                xAxisData.push(i);
                data.push((Math.sin(i / 5) * (i / 5 - 10) + i / 6) * 5);
                data2.push((Math.sin(i / 5) * (i / 5 + 10) + i / 6) * 3);
            }
            this.chart.setOption({
                backgroundColor: "#08263a",
                grid: {
                    left: "5%",
                    right: "5%"
                },
                xAxis: [{
                    show: false,
                    data: xAxisData
                }, {
                    show: false,
                    data: xAxisData
                }],
                visualMap: {
                    show: false,
                    min: 0,
                    max: 50,
                    dimension: 0,
                    inRange: {
                        color: ["#4a657a", "#308e92", "#b1cfa5", "#f5d69f", "#f5898b", "#ef5055"]
                    }
                },
                yAxis: {
                    axisLine: {
                        show: false
                    },
                    axisLabel: {
                        textStyle: {
                            color: "#4a657a"
                        }
                    },
                    splitLine: {
                        show: true,
                        lineStyle: {
                            color: "#08263f"
                        }
                    },
                    axisTick: {
                        show: false
                    }
                },
                series: [{
                    name: "back",
                    type: "bar",
                    data: data2,
                    z: 1,
                    itemStyle: {
                        normal: {
                            opacity: 0.4,
                            barBorderRadius: 5,
                            shadowBlur: 3,
                            shadowColor: "#111"
                        }
                    }
                }, {
                    name: "Simulate Shadow",
                    type: "line",
                    data,
                    z: 2,
                    showSymbol: false,
                    animationDelay: 0,
                    animationEasing: "linear",
                    animationDuration: 1200,
                    lineStyle: {
                        normal: {
                            color: "transparent"
                        }
                    },
                    areaStyle: {
                        normal: {
                            color: "#08263a",
                            shadowBlur: 50,
                            shadowColor: "#000"
                        }
                    }
                }, {
                    name: "front",
                    type: "bar",
                    data,
                    xAxisIndex: 1,
                    z: 3,
                    itemStyle: {
                        normal: {
                            barBorderRadius: 5
                        }
                    }
                }],
                animationEasing: "elasticOut",
                animationEasingUpdate: "elasticOut",
                animationDelay(idx) {
                    return idx * 20;
                },
                animationDelayUpdate(idx) {
                    return idx * 20;
                }
            });
        }
    }
};
</script>
